Abstract:The aim of this paper is to give an alternative proof of Kac's theorem for weighted projective lines over the complex field. The geometric realization of complex Lie algebras arising from derived categories is essentially used.
a α (q) 是维数向量为 α 的绝对不可分解表示同构类的个数, 他还证明了 a α (q) 是 q 的一个整系数多项式, 并猜想 a α (q) ∈ N[q] 且 a α (0) = dim C (g Q) α. Crawley-Boevey 和 Van Den Bergh [4] 证明了, 如果 α 是不可除的 (indivisible),
a α (q) 是维数向量为 α 的绝对不可分解表示同构类的个数, 他还证明了 a α (q) 是 q 的一个整系数多项式, 并猜想 a α (q) ∈ N[q] 且 a α (0) = dim C (g Q) α. Crawley-Boevey 和 Van Den Bergh [4] 证明了, 如果 α 是不可除的 (indivisible),
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